Nuclear MB1 expression was an independent predictor of worse survival in ovarian cancer.

critical role of PSMB5 in 20S proteasome (zeige PSMA5 Antikörper)-mediated protection against replicative senescence, pointing to a possible strategy for maintaining the integrity of culture-expanded bone marrow stromal cells by manipulating the expression of PSMB5

PSMB5 overexpression is associated with Bortezomib resistance in myeloma.

No mutations or differences in PSMB5 mRNA expression were seen before bortezomib treatment in 3 multiple myeloma patients, but after treatment, 1 patient showed PSMB5 upregulation associated with bortezomib resistance.

Beschreibung des Gens

The proteasome is a multicatalytic proteinase complex with a highly ordered ring-shaped 20S core structure. The core structure is composed of 4 rings of 28 non-identical subunits\; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes a member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit in the proteasome. This catalytic subunit is not present in the immunoproteasome and is replaced by catalytic subunit 3i (proteasome beta 8 subunit). Multiple transcript variants encoding different isoforms have been found for this gene.